JPH0633653Y2 - Cover integrated device terminal - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to terminals of devices such as pole switches,
More specifically, the present invention relates to a device terminal for connecting a wire end that is introduced or led out to an electrical device or the like, and a cover-integrated device terminal in which a cover covering the outer periphery of the terminal part is integrated with the terminal part. .

(Prior Art) A conventional terminal for equipment such as a pole switch uses a copper tube compression terminal and compresses the compression terminal holding an electric wire with a hydraulic tool,
This compression terminal is attached to the equipment terminal with a bolt. Furthermore, an insulating cover is capped and fixed to the outer circumference of these.

(Problems to be solved by the invention) However, this conventional one requires a lot of man-hours for attaching and detaching the terminal, which is troublesome and causes loosening of the bolt at a later date. A compression tool is required to compress the terminals. In addition, taping work is required to fix the insulating cover, which is troublesome and requires skill.

It is therefore an object of the present invention to provide a terminal in which the work of connecting an electric wire to the terminal of such a device and the covering of the device are easy and cannot be easily removed after the connection, thereby solving the above problems.

(Means for Solving the Problems) Therefore, the structure of the terminal portion of the present invention is as follows. That is, a conductor terminal electrically connected to the inside is provided on the outer circumference of the device, and inside the other end of the cylindrical conductor whose one end is fixed to this conductor terminal, a cylindrical wedge type of a plurality of pieces for gripping the outer circumference of the wire is formed. A chuck is provided, and a taper hole whose inner diameter is in contact with the outer circumference of the chuck and whose axial direction changes in the axial direction is provided on the inner circumference of the cylindrical conductor. One end of the chuck on the side opposite to the electric wire insertion end is connected to a tightening rod having both ends penetrating spiral holes formed oppositely to both outer peripheral sides of the cylindrical conductor, and both ends of the tightening rod are
It is fixed to both sides of the inner circumference of the tightening cover which is slidably and rotatably fitted on the outer circumference of the tubular conductor. An engaging edge is provided which is mutually engageable with one end edge of the tightening cover and a butt edge of a lock cover slidably provided on the outer circumference of the tubular conductor. Next, the structure of the cover covering this terminal portion is such that the base cover made of a cylindrical insulating material is fixed to the outer circumference of the lock cover, and the outer circumference of the wire having the end inserted into the chuck, the cylindrical conductor, and the clamp. A tapered cylindrical tip end cover made of an insulating material is provided to cover the attached cover, and the tip end cover is slidably locked to the tubular conductor or the fastening cover, and one end of the tip end cover is A spring for urging the tip end cover is provided so as to be constantly in contact with one end of the base cover.

(Operation) To connect the wire end to this terminal, first slide the lock cover to release the engagement with the tightening cover, and in this state, turn the tightening cover along the spiral hole of the tubular conductor. I see
When the chuck inside the tubular conductor is moved in the direction in which the inner diameter of the tapered hole increases, the inner diameter of the chuck opens. In this state, insert the conductor end of the wire into the chuck from one end of the tubular conductor, lock a monkey wrench, etc. on the outer periphery of the tightening cover, and turn the tightening cover in the opposite direction along the spiral hole. . As a result, the chuck moves in the direction in which the inner diameter of the tapered hole becomes smaller, and a tightening force is generated between the electric wire conductor and the chuck to grip the electric wire.

Then, when the tightening cover is rotated to the specified position and the lock cover is slid, the engaging edges of these tightening cover and lock cover engage, and the tightening cover cannot rotate in the direction in which the electric wire loosens. Becomes Further, when tension is applied to the electric wire in this state, a wedge effect is generated between the chuck and the tapered hole of the tubular conductor, the tightening force increases, and electric wire connection with sufficient gripping force is achieved.

Further, since the terminal portion of this invention is always covered with the base cover and the tip end cover, when connecting the terminal portion and the electric wire as described above, first of all, the tip end cover is resisted against the force of the spring and the electric wire side. Slide it on. As a result, the tightening cover and the like are exposed. Then, as described above, the base cover is slid toward the device to release the engagement between the tightening cover and the lock cover. Further, when the connection of the electric wires is completed, the base cover integrated with the lock cover is restored. Then, when a tool such as a monkey wrench is removed from the tightening cover, the tip cover slides due to the force of the spring and is brought into contact with the base cover, and the terminal portions are covered with the base cover and the tip cover.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings.

First, the structure of the terminal portion excluding the cover of the present invention will be described. The conductor terminal 2 protruding from the tip of the pushing 1 provided on the outer periphery of the device is inserted into the hollow portion 4 at one end of the tubular conductor 3 and screwed. The hollow portion 4 at the tip of the tubular conductor 3 is fixedly attached.
Forms a tapered hole 5 having a smaller diameter toward the tip, and a wedge-shaped tubular chuck 6 made of four pieces is provided in the taper 5, and one end of the chuck 6 is inserted into the hollow portion 4. Further, the chuck 6 is supported by the columnar body 7 by being locked to the outer periphery of one end of the laterally oriented columnar body 7 and winding a contact spring 8 around the outer periphery of each piece of the chuck 6. A return spring 9 is provided on the inner circumference of the tip of the chuck 6 so that each piece of the chuck 6 is constantly urged outward so that the inner diameter of the chuck 6 is increased.

Spiral holes 10 extending approximately 90 ° are provided on both sides of the cylindrical conductor 3 opposite to the outer circumference, and a tightening rod 11 that passes through both ends of the spiral hole 10 and crosses the hollow portion 4 of the cylindrical conductor 3 is provided.
The tightening rod 11 penetrates the cylindrical body 7 in the hollow portion 4. A cylindrical tightening cover 12 is rotatably and slidably provided on the outer circumference of the cylindrical conductor 3 having the spiral hole 10, and both ends of the tightening rod 11 are provided on opposite sides of the outer circumference of the tightening cover 12. Is penetrated and fixed. On the outer circumference of the tightening cover 12, there is formed a tool locking portion 13 having a hexagonal outer peripheral cross section, which can be locked with a tool such as a monkey wrench. The cylindrical conductor 3 is provided between the outer periphery of the tip end of the cylindrical conductor 3 and the inner periphery of the tightening cover 12.
A cylindrical separation guide 14 which is capped and fixed is provided on the outer periphery of the. A part of one end of the separation guide 14 slightly projects from the inner peripheral edge of the spiral hole 10 and forms a guide edge of the tightening rod 11. A tip ring 16 having a collar 15 is capped on the tip of the separation guide 14, and the tip ring 16 is fixed to the tip of the tubular conductor 3. The central hole of the tip ring 16 serves as an electric wire insertion port 17 and communicates with the opening of the tapered hole 5 of the tubular conductor 3. A cylindrical tightening guide 18 is provided on the inner periphery of the cylindrical conductor 3 on the side opposite to the separation guide 14, and a part of one end of this tightening guide 18 is slightly away from the inner peripheral edge of the spiral hole 10. It projects and forms the guide edge of the tightening rod 11. A cylindrical lock cover 19 is provided on the outer circumference of one end of the cylindrical conductor 3 on the side of the conductor terminal 2 so as to be prevented from rotating but slidable in the axial direction. An inner peripheral edge 19a is formed on the inner end of the lock cover 19, and the cylindrical conductor 3 is formed.
The outer edges 3a of the lock cover cover the outer edges of the lock cover.
A spring spring 20 having one end fixed to the outer peripheral edge 3a and the other end fixed to the inner peripheral edge 19a is provided between the inner periphery of 19 and the outer periphery of the tubular conductor 3. Due to the bias of the spring spring 20, one end of the lock cover 19 is constantly in pressure contact with one end of the tightening cover 12. A plurality of protrusions 21 are projected on the end edge of the lock cover 19 which is brought into contact with the tightening cover 12 at intervals. Further, several cutout grooves 22 into which the above-mentioned projections 21 are fitted are provided at intervals at the end of the tightening cover 12 with which the lock cover 19 is mated, and each cutout groove 22 is shown in FIG. As shown in, one side has a curved edge. And these protrusions
The fitting of 21 into the notch groove 22 is performed at the position of the tightening cover 12 when the chuck 6 inside the cylindrical conductor 3 grips the wire end. In the figure, numeral 23 is a nut screwed to the conductor terminal, and this nut 23 is for preventing the tubular conductor 3 from loosening.

In the case of this embodiment, in order to grip the conductor end of the electric wire with this terminal, as shown in FIGS. 3 and 4, the protrusion of the lock cover 19 is used.
From the state where 21 is fitted in the notch groove 22 of the tightening cover 12,
First, the lock cover 19 is pulled toward the conductor terminal 2 against the force of the spring spring 20. As a result, each protrusion 21 is disengaged from each notch groove 22 of the fastening cover 12, and the fastening cover 12 is unlocked. Then, the tool locking portion 13 of the tightening cover 12
A tool (not shown) such as a monkey wrench is locked on the outer periphery of the, and the tightening cover 12 is spirally wound along the spiral hole 10 of the tubular conductor 3 by using these tools as shown in FIG.
Rotate 90 °. As a result, the chuck 6 connected to the tightening rod 11 and the cylindrical body 7 moves in the large diameter direction inside the tapered hole 5 of the tubular conductor 3 as shown in FIG.
The inner diameter of one end is expanded by the force of. In this state, the conductor end of the electric wire (not shown) is inserted, and the electric wire is inserted until the end hits the end face of the cylindrical body 7. Then, tighten the cover 12 with the above tool.
When is rotated spirally about 90 ° along the spiral hole 10, the chuck 6 is pushed and moved in the taper hole 5 in the small diameter direction, and the inner diameter of the chuck 6 is contracted to increase the gripping force to the electric wire. Then, in the state where the tightening cover 12 is fully rotated, each protrusion 21 of the lock cover 19 is fitted into each notch groove 22 of the tightening cover 12 by the force of the spring spring 20, and the tightening cover 12 is locked. .

In this way, the wire end is connected to the terminal portion of the present invention.
When tension is applied to this electric wire, the chuck 6 moves in a direction in which the inner diameter of the chuck 6 further contracts, and the wedge action increases the gripping force of the chuck 6 on the electric wire.

Further, in order to disconnect the electric wire from the terminal portion by making this connection, pull the lock cover 19 to remove each protrusion 21 from each notch groove 22,
Rotate the tightening cover 12 along the spiral hole 10 to expand the inner diameter of the chuck 6. In this state, the wire end is pulled out from the inner circumference of the chuck 6.

Next, the cover provided integrally with the terminal of the present invention will be described.

On the outer periphery of the lock cover 19, the lock cover 19,
A cylindrical base cover 24 covering the conductor terminal 2 protruding between the end of the cylindrical conductor 3 and the bushing 1 is fixed. Adjacent to the tip side of the base cover 24, the tightening cover 12,
A tip end cover 25 is provided which is made of a tapered insulating cylinder that covers the tip end ring 16 and the outer circumference of the wire end held by the chuck 6. The abutting end of the front end cover 25 and the base cover 24 is an annular projecting edge 26 protruding from the front end surface of the base cover 24.
However, it is configured to engage with an annular groove 27 provided on the rear end surface of the tip end cover 25. A movable spring having an inner peripheral edge 28 at the inner periphery of the rear end of the front end cover 25, one end of which is fixed to the inner peripheral edge 28 and the other end of which is fixed to the flange 15 of the distal end ring 16, respectively.
29 is provided, and the tip end cover 25 is biased by the force of the movable spring 29 so as to be pressed against the tip end portion of the base cover 24. Further, from the opposite sides of the inner peripheral edge 28 of the tip end cover 25, the claws 30 are projected toward the center, and these claws 30 are parallel to the axial direction at the opposite positions of the outer circumference at one end of the tightening cover 12. Each of the guide notch grooves 31 is bored, and its tip is inserted into each guide groove 32 bored parallel to the axial direction on both sides of the separation guide 14 facing the outer circumference. The tip of each of these guide grooves 32 is bent into a key shape,
32a, and the claws 30 of the tip end cover 25 can be inserted and locked in the hooking grooves 32a. Further, each guide notch groove 31 at one end of the tightening cover 12 is integrally provided with a notch edge 33 which is notched along the tip end edge of the tightening cover 12 by about 90 °. Further, the tip end cover 25 is formed by connecting a conical cover piece 25a and a cylindrical cover piece 25b. In the figure, 35 indicates an electric wire connected to the terminal of this invention.

To remove the cover and connect the wire end to the terminal portion in this embodiment, the tip end cover 25 is pulled in the direction of the wire 35 against the force of the movable spring 29. At this time, each of the pawls 30 on the inner circumference of the tip end cover 25 is attached to each guide notch groove of the tightening cover 12.
It moves to the tip through 31 and each guide groove 32 of the separation guide 14 overlapping this. And each pawl 30 is attached to each guide groove 32.
When the tip cover 25 is rotated when it hits the tip edge of the guide groove 32, it enters into the hook groove 32a in the side of the tip end of each guide groove 32 in each pawl 30 and is locked at that location. Therefore, the tip cover 25 is held here as shown in FIG. 2, and does not return to one end of the base cover 24. In this state, when the base cover 24 is pulled in the direction of the bushing 1 against the force of the spring spring 20, the lock cover 19 moves as described above, and the tightening cover 12 is unlocked. Then, the tool locking portion 13 of the tightening cover 12 is exposed, and a tool such as a monkey wrench can be locked at the location.

Further, when the end of the electric wire 35 is inserted into the chuck 6, the guide notch groove 31 and the guide groove 32 are positioned as shown in FIG. 9 (A). The claw 30 that has entered the hooking groove 32a is in the notch groove 33 of the tightening cover 12. Then, after inserting the end of the electric wire 35 into the chuck 6, the clamp cover 12 is rotated as shown by the arrow in FIG. 9 (B) to grasp the end of the electric wire 35.
The pawl 30 is pushed by the side edge of the guide notch groove 31 of the tightening cover 12. Then, as shown in FIG. 9C, the guide notch groove 31 of the tightening cover 12 overlaps with the guide groove 32 of the separation guide 14,
When they match, the pawl 30 is disengaged from the hook groove 32a and moves to the end of the guide groove 32. Then, with the force of spring 29,
As shown in FIG. (D), the pawl 30 has an overlapping guide notch 31
And the inner end of the guide groove 32, the tip cover 25 and the base cover 24 are press-fitted to each other as shown in FIG. 1, and the terminals are covered with these covers 24, 25.

Thus, when the chuck 6 completely grasps the electric wire 35 and the tightening cover 12 is locked at a predetermined position, the tip end cover 25
The pawl 30 is unlocked, and the tip end cover 25 slides to join with the base cover 24.

In the above embodiment, the tip cover 25 is locked to the tip of the terminal and automatically slides and closes at the same time as gripping the wire, but the invention is not limited to this, and the tip cover 25 is not limited to this.
It suffices that one end of is always biased by a spring so as to be pressed against one end of the base cover. Further, the lock cover 19 is constantly biased by the force of the spring spring 20 so as to be pressed against one end of the tightening cover 12, but the present invention is not limited to this embodiment.
The lock cover 19 may be manually slid.

(Effects of the Invention) The present invention has the above-described configuration. To connect an electric wire to the terminal portion of the present invention, simply insert the electric wire end into the inner circumference of the chuck from the electric wire insertion port and spirally turn the tightening cover. It can be done by extremely simple operation. Moreover, the electric wire connection can be performed by using a simple tool such as a monkey wrench normally carried on the waist by each worker without using a conventional hydraulic tool. Further, once the wire end is gripped, the wire gripping force increases due to the wedge effect of the chuck inside the wire even if tension is applied to the wire, and the wire does not come off from the terminal portion.

Further, in this invention, these terminals are covered by the base cover and the tip cover, and if the tip cover is axially displaced, the terminals are exposed, and when the wire connection work is completed, the force of the spring causes the tip cover to be exposed. Slide over and fit together at one end of the base covers and the terminals are completely covered by these covers. Therefore, as in the conventional case, it is possible to save the labor of covering the terminal portion with a separate insulating cover after the wire connection work and further fixing it by taping or the like, and the workability is good.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, FIG. 1 is a partial cross-sectional side view of the present invention, FIG. 2 is a partial cross-sectional side view of the present invention in a state in which a tip cover is shifted and opened, and FIG. FIG. 6 is a side view of the terminal portion in the electric wire connection state of the present invention, FIG. 4 is a sectional view of the terminal portion in the state of FIG. 3, and FIG. 5 is a sectional view of the terminal portion when the electric wire is inserted, FIG. Is a side view of the terminal portion in the state of FIG. 5, FIG. 7 is a partial perspective view of the spiral hole portion of the cylindrical conductor of the present invention, and FIG. 8 is a pawl provided on the inner peripheral edge of the tip cover of the present invention. Is inserted into the guide notch groove of the tightening cover and the guide groove of the separation guide, and FIGS. 9A to 9D respectively show the operation of the tightening cover on the outer circumference of the separation guide of the present invention. It is explanatory drawing which shows the state and the position of the nail | claw of a front-end | tip part cover at that time. In the figure, 1 is a bushing, 2 is a conductor terminal, 3 is a cylindrical conductor, 4 is a hollow portion, 5 is a tapered hole, 6 is a chuck, 10 is a spiral hole, 11 is a tightening rod, 12 is a tightening cover, and 14 is a tightening cover. Is a separation guide, 17 is an electric wire insertion port, 19 is a lock cover, 20 is a spring spring, 21 is a protrusion, 22 is a notch groove, 24 is a base cover,
25 is a tip cover, 28 is an inner peripheral edge, 29 is a movable spring,
30 is a claw, 31 is a guide notch groove, and 32 is a guide groove.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Tadashi Tadashi Tadashi Tadashi, 5-2-1 Ebara, Shinagawa-ku, Tokyo Inside Saneisha Manufacturing Co., Ltd. (72) Shoji Fujimoto 5-2-1 Ebara, Shinagawa-ku, Tokyo No. Stock Company Saneisha Works

Claims (1)

[Scope of utility model registration request] 1. A tubular wedge-shaped chuck composed of a plurality of pieces for gripping the outer circumference of an electric wire is provided inside the other end of a tubular conductor whose one end is fixed to a conductor terminal provided on the outer circumference of a device. A tapered hole whose inner diameter changes is provided on the inner circumference of the tubular conductor, and both ends are penetrated into one end of the chuck opposite to the wire insertion end and a spiral hole formed opposite to both outer circumferences of the tubular conductor. Connected to the tightening rod, both ends of this tightening rod are fixed on both sides of the inner circumference of the tightening cover that is rotatably capped by sliding around the outer circumference of this cylindrical conductor. A lock cover slidably provided on the outer periphery of the cylindrical conductor is provided with engaging and recessed engaging edges, respectively, and a cylindrical insulating base cover is fixed to the outer periphery of the lock cover.
An insulative tip cover consisting of the outer circumference of the electric wire with the end inserted into the chuck, a tubular conductor and a tapered tubular body covering the tightening cover is provided. A cover-integrated type, characterized in that it is slidably locked to the outer periphery of the cover with a spring for urging the cover so that one end of the cover is always in contact with one end of the base cover. Equipment terminal.